EP 0944051 A3 20020130 - Optical storage apparatus and recording and reproducing method of optical storage medium
Title (en)
Optical storage apparatus and recording and reproducing method of optical storage medium
Title (de)
Vorrichtung zur optischen Speicherung sowie Verfahren zur Speicherung und Wiedergabe
Title (fr)
Appareil d' enregistrement optique et méthode d' enregistrement et de reproduction
Publication
Application
Priority
JP 6499098 A 19980316
Abstract (en)
[origin: EP0944051A2] A calibration processing unit is provided, a reproducing operation of an optical storage medium by a reproducing unit is executed while changing a reproducing magnetic field and a reproducing laser power, a reproducible state is measured, and a set of best values of the reproducing magnetic field and the reproducing laser power which are used in the reproducing unit are determined on the basis of the measurement result. The calibration processing unit increases the reproducing magnetic field in a state where the reproducing laser power is fixed. When the reproducible state is not obtained, the measurement of the reproducible state due to the increase in reproducing magnetic field is repeated while increasing the reproducing laser power step by step. The reproducible state can be also measured while alternately increasing the reproducing laser power and the reproducing magnetic field. <IMAGE>
IPC 1-7
IPC 8 full level
G11B 7/126 (2012.01); G11B 11/105 (2006.01); G11B 7/125 (2006.01)
CPC (source: EP KR US)
G11B 7/005 (2013.01 - KR); G11B 7/126 (2013.01 - EP US); G11B 7/1263 (2013.01 - KR); G11B 11/105 (2013.01 - KR); G11B 11/10595 (2013.01 - EP US); G11B 11/10515 (2013.01 - EP US)
Citation (search report)
- [X] US 5699342 A 19971216 - YAGI KOSUKE [JP], et al
- [XY] US 5367509 A 19941122 - FUKUMOTO ATSUSHI [JP], et al
- [A] EP 0536404 A1 19930414 - SONY CORP [JP]
- [A] EP 0526641 A1 19930210 - SONY CORP [JP]
- [YA] PATENT ABSTRACTS OF JAPAN vol. 1996, no. 12 26 December 1996 (1996-12-26) & US 5796704 A 19980818 - NANBA YOSHIYUKI [JP], et al
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 0944051 A2 19990922; EP 0944051 A3 20020130; EP 0944051 B1 20060607; CN 1112678 C 20030625; CN 1229230 A 19990922; DE 69834803 D1 20060720; DE 69834803 T2 20061109; JP 3778399 B2 20060524; JP H11259925 A 19990924; KR 100341667 B1 20021031; KR 19990076529 A 19991015; US 6331966 B1 20011218
DOCDB simple family (application)
EP 98307936 A 19980930; CN 98117086 A 19981211; DE 69834803 T 19980930; JP 6499098 A 19980316; KR 19980047278 A 19981105; US 16252598 A 19980929